具有SSL问题的IIS Express调试

Question

I have a vanilla MVC project that I am attempting to run using HTTPS. I am getting an error back from Chrome to the effect of "ERR_SSL_PROTOCOL_ERROR". I have "SSL Enabled" set to true and when I debug the application, the project URL set to https://localhost:44333/ does load in the browser window as expected.

I have spent almost 2 days trying to figure this issue out to no avail. I have uninstalled IIS Express 10 twice, repaired Visual Studio 2015, and followed directions on various blog posts like this one .

I have looked in my certmgr.msc too and I cannot find a localhost Trusted Root Certificate Authority under "Trusted Root Certificate Authority > Certificates" either. I am not sure if there is suppossed to be a cert there or not but I thought that info might be helpful to anyone that can point me in the right direction.

Any ideas on what could be going on?

• Windows 7
• IIS 10.0 Express

Answer 1

I found out that I had two IIS Express Certificates installed. I followed the following thread that helped me solve the issue I was having...

How do I fix a missing IIS Express SSL Certificate?

Answer 2

I had a similar problem, the cause was a certificate installed on machine level (which makes sense) and not for my user. I had to run MMC as administrator to delete them from the personal store (localMachine).

After that repairing IIS sorted the problems.